Abstract: A device for metered delivery of a liquid or viscous substance comprising a casing, a reciprocating differential piston able to slide in said casing, a metering chamber and at least one outlet for media delivery, the volume of the metering chamber varying during the piston stroke and comprising an inlet communicating with the outside of the casing via a first non-return valve, said piston comprising a central bore connecting said metering chamber by way of a central bore inlet and said at least one outlet via a passage, said central bore inlet being provided with a second non-return valve, said first non-return valve and second non-return valve being arranged face to face, piston stroke length being able to adjust the volume of the metering chamber.

Abstract: Testing apparatus for simulating the behavior of contact moving under normal force loading in machine components with at least two test objects and at least one first test object performs a rolling movement with or without a superimposed sliding movement on a second test object, in which at least the first test object can be driven by means of an eccentric arrangement, the latter including a first short crank receiving at a substantially constant speed about a first spindle, as well as a second short crank, which is articulated to the first crank on a second spindle at a distance from the first spindle, together with a third long crank, which is articulated to the second crank on a third spindle at a distance from the second spindle and is provided with a spatially fixed spindle at a distance from the third spindle and the fixed spindle is connected in non-rotary manner with spindles of the test object.